CN113725384A - Display panel and display device - Google Patents
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- CN113725384A CN113725384A CN202111018499.5A CN202111018499A CN113725384A CN 113725384 A CN113725384 A CN 113725384A CN 202111018499 A CN202111018499 A CN 202111018499A CN 113725384 A CN113725384 A CN 113725384A
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- H—ELECTRICITY
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Abstract
The embodiment of the invention discloses a display panel and a display device, wherein the display panel comprises a substrate, a pixel limiting layer, a light emitting layer, a first electrode layer and a first shading structure; the pixel limiting layer is provided with a plurality of first openings, the light-emitting layer comprises a plurality of light-emitting units, and the light-emitting units are positioned in the first openings and positioned on one side of the first openings, which is close to the substrate; along the direction perpendicular to the plane of the substrate base plate, the aperture of the first opening is gradually increased, and the thickness of the light-emitting unit is smaller than the depth of the first opening; the first electrode layer is positioned on one side of the light-emitting layer and the pixel limiting layer, which is far away from the substrate base plate, and comprises a first electrode subsection which is overlapped with the orthographic projection of the side wall of the first opening on the substrate base plate; the first light shielding structure is arranged on one side, far away from the substrate base plate, of the first electrode layer, and the orthographic projection of the first light shielding structure and the orthographic projection of the first electrode subsection on the substrate base plate are overlapped. The scheme of the embodiment of the invention can improve the display effect of the display panel in the black screen state.
Description
Technical Field
The present invention relates to display technologies, and in particular, to a display panel and a display device.
Background
With the development of display technology, users have increasingly high requirements for the display effect of the display device.
An Organic Light-Emitting Diode (OLED) display panel includes Light-Emitting diodes arranged in an array. The anode metal layer and the cathode metal layer of the light emitting diode reflect the ambient light incident into the display panel, so that the ambient light is emitted out of the display panel again, and thus, a user can still observe the bright light in the black screen state of the display device, and the display effect is affected.
Disclosure of Invention
The embodiment of the invention provides a display panel and a display device, which are used for improving the display effect of the display panel in a black screen state.
In a first aspect, an embodiment of the present invention provides a display panel, including:
a substrate base plate;
a pixel defining layer on one side of the substrate base plate; the pixel limiting layer is provided with a plurality of first openings, and the apertures of the first openings are gradually increased along the direction of the substrate base plate pointing to the pixel limiting layer to form the side walls of the first openings;
the light-emitting layer comprises a plurality of light-emitting units, and the light-emitting units are positioned in the first opening and positioned on one side of the first opening close to the substrate; the thickness of the light-emitting unit is smaller than the depth of the first opening along the direction perpendicular to the plane of the substrate base plate;
the first electrode layer is positioned on one side of the light-emitting layer and the pixel limiting layer, which is far away from the substrate; the first electrode layer comprises a first electrode subsection, and an orthographic projection of the first electrode subsection on the substrate base plate is overlapped with an orthographic projection of the side wall of the first opening on the substrate base plate;
the first shading structure is positioned on one side of the first electrode layer, which is far away from the substrate; an orthographic projection of the first light shielding structure on the substrate base overlaps with an orthographic projection of the first electrode subsection on the substrate base.
In a second aspect, an embodiment of the present invention further provides a display device, including the display panel provided in the first aspect.
According to the technical scheme of the embodiment of the invention, as the depth of the light-emitting unit is less than that of the first opening of the pixel limiting layer, the first electrode layer is uneven to form a blazed grating structure, and the reflectivity of the first electrode layer, especially the reflectivity of the first electrode subsection at the side wall of the first opening to ambient light is higher.
Drawings
Fig. 1 is a schematic structural diagram of a display panel according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of another display panel according to an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of another display panel according to an embodiment of the present invention;
FIG. 4 is a schematic structural diagram of another display panel provided in the embodiment of the present invention;
FIG. 5 is a schematic structural diagram of another display panel according to an embodiment of the present invention;
FIG. 6 is a schematic structural diagram of another display panel according to an embodiment of the present invention;
FIG. 7 is a schematic structural diagram of another display panel according to an embodiment of the present invention;
FIG. 8 is a schematic structural diagram of another display panel according to an embodiment of the present invention;
fig. 9 is a schematic partial structure diagram of a display panel according to an embodiment of the present invention;
fig. 10 is a schematic structural diagram of a display device according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for convenience of description, only a part of the structure related to the present invention is shown in the drawings, not the whole structure, and the shapes and sizes of the respective elements in the drawings do not reflect the true scale thereof, and are only for schematically illustrating the contents of the present invention.
It will be apparent to those skilled in the art that various modifications and variations can be made in the present application without departing from the spirit or scope of the application. Thus, it is intended that the present application cover the modifications and variations of this application provided they come within the scope of the corresponding claims (the claimed subject matter) and their equivalents. It should be noted that the embodiments provided in the embodiments of the present application can be combined with each other without contradiction.
As described in the background art, the structures such as the anode metal layer and the cathode metal layer of the light emitting diode reflect the ambient light incident into the display panel, so that the ambient light is emitted out of the display panel again, and thus, the user can still observe the bright light in the black screen state of the display device, which affects the display effect. In addition, in the prior art, because the light emitting layer of the light emitting diode is located in the opening of the pixel defining layer, the cathode metal layer of the light emitting diode is uneven to form a blazed grating structure, and the reflectivity of the partial cathode metal located on the side wall of the opening of the pixel defining layer to the ambient light is higher than the reflectivity of the cathode metal located at other positions to the ambient light, so that the influence on the display effect in a black screen state is larger. Moreover, when the technique of replacing the polarizer with the color filter film is adopted, that is, the color filter film is directly arranged on the packaging layer, and the effect of blocking the reflection of ambient light is achieved by utilizing the filtering principle of the color filter film, the rainbow texture phenomenon becomes obvious due to the increase of the local reflectivity, and the display effect in the black screen state is greatly influenced. The rainbow texture phenomenon refers to a phenomenon that after ambient light passes through a film layer such as a color filter film, strong reflection occurs in an electrode layer (such as a cathode layer) of a light emitting diode, reflected light is subjected to unilateral diffraction when passing through the edge of a Black Matrix (BM), diffracted light and reflected light perform complex light interference and the like, so that color separation occurs, and since the filter film of each sub-pixel corresponds to monochromatic light, macroscopically, color textures of various colors with a certain period are presented, which is called a rainbow texture phenomenon or a color separation phenomenon. It follows that the rainbow effect becomes noticeable when the reflectance of ambient light increases.
In order to solve the above problem, an embodiment of the present application provides a display panel, which includes a substrate, a pixel defining layer, a light emitting layer, a first electrode layer, and a first light shielding structure; the pixel defining layer is positioned on one side of the substrate; the pixel limiting layer is provided with a plurality of first openings, and the apertures of the first openings are gradually increased along the direction of the substrate base plate pointing to the pixel limiting layer to form the side walls of the first openings; the light-emitting layer comprises a plurality of light-emitting units, and the light-emitting units are positioned in the first opening and positioned on one side of the first opening close to the substrate; the thickness of the light-emitting unit is smaller than the depth of the first opening along the direction perpendicular to the plane of the substrate base plate; the first electrode layer is positioned on one side of the light-emitting layer and the pixel limiting layer, which is far away from the substrate; the first electrode layer comprises a first electrode subsection, and an orthographic projection of the first electrode subsection on the substrate base plate is overlapped with an orthographic projection of the side wall of the first opening on the substrate base plate; the first shading structure is positioned on one side of the first electrode layer far away from the substrate; an orthographic projection of the first light shielding structure on the substrate base overlaps with an orthographic projection of the first electrode subsection on the substrate base.
By adopting the above technical scheme, because the first shading structure is positioned on one side of the first electrode layer far away from the substrate base plate, and the orthographic projection of the first shading structure on the substrate base plate is overlapped with the orthographic projection of the first electrode subsection on the substrate base plate, at least part of ambient light incident to the first electrode subsection can be shielded by utilizing the first shading structure, the reflectivity of the first electrode subsection to the ambient light is reduced, the rainbow texture phenomenon is weakened, and the display effect of the display panel in the black screen state is improved.
The above is the core idea of the present application, and based on the embodiments in the present application, a person skilled in the art can obtain all other embodiments without making creative efforts, which belong to the protection scope of the present application. The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application.
Fig. 1 is a schematic structural diagram of a display panel according to an embodiment of the present invention, and referring to fig. 1, a display panel 100 includes: a substrate base plate 10, a pixel defining layer 20, a light emitting layer 30, a first electrode layer 40 and a first light shielding structure 51; the pixel defining layer 20 is located at one side of the base substrate 10; the pixel defining layer 20 has a plurality of first openings 201, and the apertures of the first openings 201 gradually increase along the direction of the substrate base plate 10 pointing to the pixel defining layer 20 to form the sidewalls of the first openings 201; the light-emitting layer 30 includes a plurality of light-emitting units 31, and the light-emitting units 31 are located in the first opening 201 and on a side of the first opening 201 close to the substrate 10; the thickness of the light emitting unit 31 is smaller than the depth of the first opening 201 in the direction perpendicular to the plane of the base substrate 10; the first electrode layer 40 is located on the side of the light-emitting layer 30 and the pixel defining layer 20 away from the base substrate 10; the first electrode layer 40 comprises a first electrode subsection 41, the orthographic projection of the first electrode subsection 41 on the substrate base plate 10 overlaps with the orthographic projection of the sidewall of the first opening 201 on the substrate base plate 10; the first light shielding structure 51 is located on one side of the first electrode layer 40 away from the substrate base plate 10; the orthographic projection of the first light shielding structure 51 on the substrate base 10 overlaps with the orthographic projection of the first electrode subsection 41 on the substrate base 10.
As shown in fig. 1, in the present embodiment, the display panel 100 further includes a driving circuit layer 71 and a second electrode layer, the driving circuit layer 71 is located on one side of the substrate base plate 10 close to the pixel defining layer 20; a second electrode layer located between the drive circuit layer 71 and the pixel defining layer 20, the second electrode layer comprising a plurality of discrete second electrodes 75; the first opening 201 exposes a portion of the second electrode 75. The second electrode 75 refers to an anode of the light emitting diode, the first electrode layer 40 refers to a cathode of the light emitting diode, and the light emitting unit 31 is a light emitting layer of the light emitting diode, and may specifically include an electron injection layer, an electron transport layer, a hole blocking layer, a light emitting functional layer, an electron blocking layer, a hole transport layer, a hole injection layer, and other film layers. The driving circuit layer 71 includes a plurality of pixel driving circuits, one pixel driving circuit is electrically connected to at least one light emitting diode for driving the light emitting diode to emit light, and the specific structure thereof is not illustrated and limited herein, and those skilled in the art can design a corresponding pixel driving circuit according to actual requirements. In the present embodiment, the cathode (i.e., the first electrode layer 40) shared by all the light emitting diodes is taken as an example for description, in other embodiments, the cathode of each light emitting diode may be independently disposed, and the present invention is not limited thereto.
With continued reference to fig. 1, in the present embodiment, the aperture of the first opening 201 gradually increases in a direction in which the substrate base plate 10 points toward the pixel defining layer 20, so that the sidewall of the first opening 201 is a slope. Since the light emitting unit 31 is located in the first opening 201 and on a side of the first opening 201 close to the substrate base plate 10, and the thickness of the light emitting unit 31 is smaller than the depth of the first opening 201, the first electrode layer 40 is not flat, that is, portions of the first electrode layer 40 are not located in the same plane. The first electrode layer in the display panel 100, which is located in the first opening 201, may form a blazed grating structure, and the first electrode subsection 41, which is overlapped with the side wall projection of the first opening 201, has a high reflectivity for ambient light, and has a large influence on the display effect of the display panel in a black screen state.
With reference to fig. 1, in the present embodiment, a first light shielding structure 51 is disposed on a side of the first electrode layer 40 away from the substrate 10, and an orthographic projection of the first light shielding structure 51 on the substrate 10 overlaps with an orthographic projection of the first electrode subsection 41 on the substrate 10, so that at least a portion of the ambient light incident on the first electrode subsection 41 can be shielded by the first light shielding structure 51, the reflectivity of the first electrode subsection 41 to the ambient light is reduced, and the display effect in the black screen state is improved.
In addition, as shown in fig. 1, the optional display panel 100 further includes a color filter layer located on a side of the first electrode layer 40 away from the substrate 10, the color filter layer includes a plurality of color resistance units 60, and an orthogonal projection of the color resistance units 60 on the substrate 10 covers an orthogonal projection of the light emitting units 31 on the substrate 10, so that reflection of ambient light can be blocked by a filtering principle of the color filter layer. As can be seen from fig. 1, the color resistance unit 60 covers the first electrode layer 40 in the first opening 201, and in this embodiment, the first light shielding structure 51 is arranged to reduce the reflectivity of the first electrode subsection 41 to the ambient light, so as to weaken the rainbow effect caused after the reflected ambient light exits through the color resistance unit 60, and improve the display effect in the black screen state.
For example, the material of the first light shielding structure 51 may be a black photoresist material.
According to the embodiment of the invention, the first light shielding structure is arranged, so that the first light shielding structure is positioned on one side of the first electrode layer, which is far away from the substrate base plate, and the orthographic projection of the first light shielding structure on the substrate base plate is overlapped with the orthographic projection of the first electrode subsection on the substrate base plate, so that at least part of ambient light incident to the first electrode subsection can be shielded by the first light shielding structure, the reflectivity of the first electrode subsection to the ambient light is reduced, the rainbow texture phenomenon is weakened, and the display effect of the display panel in a black screen state is improved.
On the basis of the above described embodiment, as shown in fig. 1, the orthographic projection of the optional first light shielding structure 51 on the base substrate 10 covers the orthographic projection of the first electrode subsection 41 on the base substrate 10. In this way, all the ambient light incident on the first electrode sub-assembly 41 can be blocked by the first light blocking structure 51, so that the reflectivity of the first electrode sub-assembly 41 to the ambient light is reduced, and the display effect of the display panel in the black screen state is improved.
Further, the orthographic projection of the optional first light shielding structure 51 on the substrate base 10 overlaps with the orthographic projection of the first electrode subsection 41 on the substrate base 10. In this way, it is possible to block all the ambient light incident on the first electrode subsection 41, and to avoid a large influence on the light beam emitted from the light emitting unit 31, thereby ensuring the display brightness of the display panel.
With regard to the film layer position where the first light shielding structure 51 is located, there may be the following alternatives.
Referring to fig. 1, an optional first light shielding structure 51 is in contact with the first electrode subsection 41. With such an arrangement, the first light shielding structure 51 can have a good shielding effect on ambient light, and the alignment difficulty between the first light shielding structure 51 and the first electrode subsection 41 can be reduced, thereby reducing the process difficulty.
Fig. 2 is a schematic structural diagram of another display panel according to an embodiment of the present invention, referring to fig. 2, optionally, the display panel 100 further includes a color filter layer, where the color filter layer is located on a side of the first electrode layer 40 away from the substrate 10; the color filter layer comprises a plurality of color resistance units 60, a second light shielding structure 52 is arranged between the adjacent color resistance units 60, and the orthographic projection of the color resistance units 60 on the substrate 10 covers the orthographic projection of the light-emitting units 31 on the substrate 10; the first light shielding structure 51 and the second light shielding structure 52 are disposed on the same layer.
The second light shielding structure 52 may be a black matrix made of a black photoresist material. By providing the second light shielding structure 52 between adjacent color-resisting units 60, the mutual crosstalk of light emitted from different light-emitting units 31 can be reduced. In this embodiment, the first light shielding structure 51 and the second light shielding structure 52 are disposed in the same layer, so that the reflectivity of the first electrode subsection 41 to the ambient light is reduced, and the thickness of the display panel is prevented from being increased.
Further, the first light shielding structure 51 and the second light shielding structure 52 may be made of the same material in the same process. Therefore, the process steps can be saved, and the production efficiency can be improved.
Fig. 3 is a schematic structural diagram of another display panel according to an embodiment of the present invention, referring to fig. 3, when the first light shielding structure 51 and the second light shielding structure 52 are disposed in the same layer, the thickness of the first light shielding structure 51 may be smaller than that of the second light shielding structure 52 along a direction perpendicular to the plane of the substrate 10. In this way, the shielding of the first light shielding structure 51 on the light beam emitted from the light emitting unit 31 can be reduced, and the display brightness of the display panel can be ensured.
Of course, the above-described structure is not limited. As shown in fig. 3, the display panel 100 may further include a thin film encapsulation layer 72 located on a side of the first electrode layer 40 away from the substrate 10, a touch layer 73 located on a side of the thin film encapsulation layer 72 away from the substrate 10, and an optical adhesive layer 74 located on a side of the color filter layer away from the substrate 10, in other embodiments, the first light shielding structure 51 may be further disposed on a same layer as any one of the touch layer 73 and the optical adhesive layer 74, or the first light shielding structure 51 may be further embedded in the thin film encapsulation layer 72 away from the substrate 10, as long as it is ensured that the first light shielding structure 51 is located on a side of the first electrode layer 40 away from the substrate 10, and an orthographic projection of the first light shielding structure 51 on the substrate 10 overlaps with an orthographic projection of the first electrode subsection 41 on the substrate 10.
For example, referring to fig. 4, fig. 4 is a schematic structural diagram of another display panel according to an embodiment of the present invention, and fig. 4 illustrates an example in which the first light shielding structure 51 and the touch layer 73 are disposed on the same layer, and an orthographic projection of the first light shielding structure 51 on the substrate 10 overlaps with an orthographic projection of the first electrode subsection 41 on the substrate 10. Referring to fig. 5, fig. 5 is a schematic structural diagram of another display panel according to an embodiment of the present invention, and fig. 5 illustrates an example in which the first light shielding structure 51 and the optical adhesive layer 74 are disposed in the same layer, and an orthographic projection of the first light shielding structure 51 on the substrate 10 overlaps with an orthographic projection of the first electrode subsection 41 on the substrate 10.
As for the material of the first light shielding structure 51, in addition to selecting the same black photoresist material as the black matrix, there are the following alternatives.
Fig. 6 is a schematic structural diagram of another display panel according to an embodiment of the invention, and referring to fig. 6, the display panel 100 further includes a color filter layer, the color filter layer is located on a side of the first electrode layer 40 away from the substrate 10; the color filter layer comprises a plurality of color resistance units 60, and the orthographic projection of the color resistance units 60 on the substrate base plate 10 covers the orthographic projection of the light-emitting units 31 on the substrate base plate 10; the light emitting unit 31 includes a first color light emitting unit 311, a second color light emitting unit 312, and a third color light emitting unit 313, and the first color light emitting unit 311 emits light of a first color having a central wavelength λ1The central wavelength of the light of the second color emitted from the second color light emitting unit 312 is λ2The central wavelength of the light of the third color emitted from the third color light emitting unit 313 is λ3(ii) a The color resistance unit 60 comprises a first color resistance unit 61, a second color resistance unit 62 and a third color resistance unit 63, the first color resistance unit 61 is arranged corresponding to the first color light emitting unit 311, the second color resistance unit 62 is arranged corresponding to the second color light emitting unit 312, and the third color resistance unit 63 is arranged corresponding to the third color light emitting unit 313; the first light shielding structure 51 includes a first sub light shielding structure 511, a second sub light shielding structure 512 and a third sub light shielding structure 513; the orthographic projection of the first sub light shielding structure 511 on the substrate base plate 10 is overlapped with the orthographic projection of the first color resistance unit 61 on the substrate base plate 10, and the orthographic projection of the second sub light shielding structure 512 on the substrate base plate 10 is overlapped with the orthographic projection of the second sub light shielding structure 512 on the substrate base plate 10The orthographic projections of the color resistance units 62 on the substrate base plate 10 are overlapped, and the orthographic projection of the third sub light shielding structure 513 on the substrate base plate 10 is overlapped with the orthographic projection of the third color resistance units 63 on the substrate base plate 10; the first sub light shielding structure 511 and the second color resistance unit 62 and/or the third color resistance unit 63 are prepared from the same material in the same process, the second sub light shielding structure 512 and the first color resistance unit 61 and/or the third color resistance unit 63 are prepared from the same material in the same process, and the third sub light shielding structure 513 and the first color resistance unit 61 and/or the second color resistance unit 62 are prepared from the same material in the same process.
The color resistance unit 60 has a filtering function, the color resistance unit 60 is disposed corresponding to the light emitting unit 31, and can transmit light having the same color (central wavelength) as that of light emitted by the light emitting unit 31, and the color (central wavelength) of light transmitted by the color resistance units 60 of different colors is different. In view of this, this embodiment adopts the different color resistance material preparation of the color resistance unit 60 with corresponding through setting up first light-shielding structure 51 and obtains, can utilize the color (central wavelength) difference of the light that the color resistance unit of different colors can see through, make first light-shielding structure 51 and corresponding color resistance unit 60 cooperation realize the sheltering from to ambient light, reduce first electrode subsection 41 to the reflectivity of ambient light, weaken rainbow line phenomenon, improve the display effect of display panel under the black screen state.
Specifically, the first sub light shielding structure 511 overlaps with the orthographic projection of the first color resistance unit 61 on the substrate 10, and overlaps with the orthographic projection of the first electrode subsection 41 covered by the first color resistance unit 61 on the substrate 10, at this time, the first light shielding structure 51 can be prepared in the same process with the same material for the second color resistance unit 62 and/or the third color resistance unit 63, and since the colors of the light transmitted by the first color resistance unit 61 and the second color resistance unit 62 (the third color resistance unit 63) are different, the light transmitted by the first color resistance unit 61 in the ambient light cannot transmit the second color resistance unit 62 (the third color resistance unit 63), and therefore cannot be incident on the first electrode 41 covered by the first color resistance unit 61, and further the reflectivity of the ambient light can be reduced, the display effect of the display panel in the black screen state is improved. Similarly, the second sub light shielding structure 512 overlapped with the orthographic projection of the second color resistance unit 62 can be prepared in the same process by using the same material as the first color resistance unit 61 and/or the third color resistance unit 63, so as to shield the ambient light incident on the first electrode subsection 41 covered by the second color resistance unit 62; the third sub light shielding structure 513 overlapped with the third color resistance unit 63 in projection can be prepared in the same process by using the same material as the first color resistance unit 61 and/or the second color resistance unit 62, so as to shield the ambient light incident on the first electrode subsection 41 covered by the third color resistance unit 63.
Exemplarily, as shown in fig. 6, in the present embodiment, the first sub light shielding structure 511 is made of the same material as the third color resistance unit 63; the second sub light shielding structure 512 is made of the same material as the first color resistance unit 61, and the third sub light shielding structure 513 is made of the same material as the second color resistance unit 62. Of course, this structure is merely illustrative, and not restrictive, as long as the color (central wavelength) of the light transmitted by the first light shielding structure 51 and the color resistance unit 60 corresponding thereto are different.
It should be noted that, in the present embodiment, only the first light-shielding structure 51 and the color resistance units 60 of other colors are prepared in the same process as an example, so that the process steps can be saved, and the production efficiency can be improved. In other embodiments, the first light shielding structure 51 may be prepared in a different process step from the color resistance units 60 of other colors, as long as it is ensured that the first light shielding structure 51 is made of a color resistance material with a color different from that of the corresponding color resistance unit 60.
Optionally, the central wavelength of the first color light is 620nm to 630nm, the central wavelength of the second color light is 555nm to 585nm, and the central wavelength of the third color light is 440nm to 480 nm. In other words, the light of the first color may be red light, the light of the second color may be green light, and the light of the third color may be blue light. Correspondingly, the light emitting color of the first color light emitting unit 311 is red light, and the central wavelength is 620nm to 630 nm; the light emitting color of the second color light emitting unit 312 is green light, and the central wavelength is 555nm to 585 nm; the light emitting color of the third color light emitting unit 313 is blue light, and the central wavelength is 440nm to 480 nm; the light transmitted by the first color resistance unit 61 is red light, and the central wavelength is 620 nm-630 nm; the light transmitted by the second color resistance unit 62 is green light, and the central wavelength is 555nm to 585 nm; the light transmitted by the third color resistance unit 63 is blue light, and the central wavelength is 440nm to 480 nm.
With reference to fig. 6, optionally, the first light shielding structure 51 is embedded in the corresponding color resistor unit 60, and the thickness of the first light shielding structure 51 is smaller than that of the corresponding color resistor unit 60 along the direction perpendicular to the plane of the substrate base plate 10.
Specifically, when the first light shielding structure 51 is embedded in the corresponding color resistor unit 60, if the thicknesses of the first light shielding structure 51 and the corresponding color resistor unit 60 are equal, a part of the ambient light can enter the first electrode subsection 41, and the light shielding effect is reduced. Therefore, in the present embodiment, when the first light shielding structure 51 is embedded in the corresponding color resistor unit 60, the thickness of the first light shielding structure 51 is set to be smaller than the thickness of the corresponding color resistor unit 60, so that the first light shielding structure 51 and the corresponding color resistor unit 60 can be used to shield the ambient light incident to the first electrode subsection 41, and the increase of the thickness of the display panel can be avoided. The specific principle is described above, and is not repeated herein.
For example, as shown in fig. 6, the first sub light shielding structure 511 is embedded in the first color resistance unit 61, and the thickness of the first sub light shielding structure 511 is smaller than that of the first color resistance unit 61 along the direction perpendicular to the plane of the substrate base plate 10; the second sub light shielding structure 512 is embedded in the second color resistance unit 62, and the thickness of the second sub light shielding structure 512 is smaller than that of the second color resistance unit 62 along the direction perpendicular to the plane of the substrate base plate 10; the third sub light-shielding structure 513 is embedded in the third color resistance unit 63, and the thickness of the third sub light-shielding structure 513 is smaller than that of the third color resistance unit 63 along the direction perpendicular to the plane of the substrate 10.
When the first light shielding structure 51 is made of a color resist material having a color different from that of the corresponding color resist unit, the structure shown in fig. 6 is not limited. Fig. 7 is a schematic structural diagram of another display panel according to an embodiment of the present invention, and referring to fig. 7, the first light shielding structure 51 and the optical adhesive layer 74 may be optionally disposed on the same layer. In addition, fig. 8 is a schematic structural diagram of another display panel according to an embodiment of the present invention, and referring to fig. 8, the first light shielding structure 51 and the touch layer 73 may be optionally disposed on the same layer. As long as it is ensured that the first light shielding structure 51 overlaps with the orthographic projection of the corresponding color resistance unit 60 on the substrate 10 and overlaps with the orthographic projection of the first electrode subsection 41 on the substrate 10.
Further, the thickness of the first light shielding structure 51 may be 1 μm to 5 μm, and the thickness of the portion of the color resistance unit 60 overlapping with the orthographic projection of the first light shielding structure 51 on the substrate 10 may be 1 μm to 5 μm.
Specifically, if the thickness of the color resist material is too thin, the light absorption capability for light of different colors is weak. For example, if the thickness of the red color resist is too thin, part of the blue light and green light may transmit through the red color resist. Therefore, in this embodiment, in order to ensure the light shielding effect, the thicknesses of the first light shielding structure 51 and the part of the color resistance unit 60 overlapping with the orthographic projection of the first light shielding structure 51 should not be too thin, and the thicknesses of the first light shielding structure 51 and the part of the color resistance unit 60 overlapping with the orthographic projection of the first light shielding structure 51 are selected to be at least 1 μm, so as to ensure that the first light shielding structure 51 and the part of the color resistance unit 60 overlapping with the orthographic projection of the first light shielding structure 51 have sufficient light absorption capability and ensure the shielding capability for the ambient light incident to the first electrode subsection 41.
In addition, if the thickness of the color-resistant material is too thick, on one hand, the thickness of the display panel is increased, and on the other hand, the color-resistant unit 60 also causes more loss to the light transmitted through it, which affects the light-emitting efficiency and the display brightness of the display panel. Taking the red color resistor as an example, if the thickness of the red color resistor is too thick, the loss of red light will be increased. Therefore, the maximum thickness of the color resistance unit 60 should not be too thick. Particularly, when the first light shielding structure 51 is embedded in the corresponding color resistor unit 60, the maximum thickness of the color resistor unit 60 is the sum of the thicknesses of the first light shielding structure 51 and the portion of the color resistor unit 60 overlapping the orthographic projection of the first light shielding structure 51, and therefore, the thicknesses of the first light shielding structure 51 and the portion of the color resistor unit 60 overlapping the orthographic projection of the first light shielding structure 51 are not preferably too thick. The thickness of the first light shielding structure 51 can be selected to be at most 5 μm, so that the first light shielding structure can avoid affecting the light emitting efficiency and the display brightness of the display panel while shielding the ambient light, and avoid excessively increasing the overall thickness of the display panel, no matter whether the first light shielding structure 51 is embedded in the corresponding color resistance unit 60.
In summary, the above embodiments have been described in detail with respect to the arrangement position of the first light shielding structure 51 and the materials used. On the basis of any of the above embodiments, fig. 9 is a schematic view of a partial structure of a display panel provided in an embodiment of the present invention, and referring to any of fig. 1 to 6 and fig. 9, optionally, the display panel 100 further includes a color filter layer, where the color filter layer is located on a side of the first electrode layer 40 away from the substrate 10; the color filter layer comprises a plurality of color resistance units 60, a second light shielding structure 52 is arranged between the adjacent color resistance units 60, and the orthographic projection of the color resistance units 60 on the substrate 10 covers the orthographic projection of the light-emitting units 31 on the substrate 10; the color resistance unit 60 includes a first color resistance subsection 601 and a second color resistance subsection 602; the orthographic projections of the first color-resisting subsection 601, the second color-resisting subsection 602, the first light shielding structure 51 and the second light shielding structure 52 on the substrate 10 are respectively a first color-resisting projection 6010, a second color-resisting projection 6020, a first light shielding projection 510 and a second light shielding projection 520 in sequence; the first color-blocked projection 6010, the second color-blocked projection 6020, the first light-blocked projection 510, and the second light-blocked projection 520 do not overlap with each other, and the first light-blocked projection 510 surrounds the first color-blocked projection 6010, the second color-blocked projection 6020 surrounds the first light-blocked projection 510, and the second light-blocked projection 520 surrounds the second color-blocked projection 6020; the color resistance units 60 include a plurality of color resistance units 60 (shown with different filling) of different colors, and the ratio of the lengths of the first color resistance subsections 601 of the color resistance units 60 of different colors in the first direction x and the second direction y
Equal, differently colored second color resistance segments 602 of color resistance units 60 have a ratio of lengths in the first direction x and the second direction y
Equal; the first direction x and the second direction y intersect and are both parallel to the plane of the substrate base plate 10.
Specifically, referring to any one of fig. 1 to 6, the color resistance unit 60 of different colors at least includes a first color resistance subsection 601 and a second color resistance subsection 602, orthogonal projections of the first color resistance subsection 601 and the second color resistance subsection 602 on the substrate 10 are not overlapped with orthogonal projections of the first light shielding structure 51 and the second light shielding structure 52 on the substrate 10, and the first color resistance subsection 601 and the second color resistance subsection 602 are light-transmitting parts in the color resistance unit 60. Due to the arrangement of the first light shielding structure 51, the original color resistance unit 60 is divided into a plurality of parts, so that ambient light can be diffracted in the propagation process, and if the diffracted light is different in different directions, the dispersion may be deteriorated, and the display effect in the black screen state is affected. In order to avoid this problem, in the present embodiment, the ratio (aspect ratio) of the lengths of the first color blocking sections 601 of the color blocking units 60 of different colors in the first direction x and the second direction y and the ratio (aspect ratio) of the lengths of the second color blocking sections 602 in the first direction x and the second direction y are both equal, so as to avoid the difference of the diffracted light in different directions due to the different aspect ratios of the light-transmitting portions of the color blocking units of different colors, thereby avoiding the serious dispersion and improving the display effect of the display panel in the black screen state.
For example, referring to fig. 6 and 9, the color resistance unit 60 may include a first color resistance unit 61 (e.g., a red color resistance unit), a second color resistance unit 62 (e.g., a green color resistance unit), and a third color resistance unit 63 (e.g., a blue color resistance unit). In this embodiment, the first color resist sub-portions 601 of the color resist units 60 of different colors satisfy
That is, the ratio of the lengths of the first color resist sections 601 of the color resist units 60 of different colors in the first direction x and the second direction y is equal. In the formula, X1RThe length of the first color resist subsection 601 in the first direction x, Y1, representing the red color resist cellRThe first color resistor sub-section 601 representing the red color resistor unit is at the secondLength in direction y; x1GThe length of the first color resist subsection 601 in the first direction x, Y1, representing the green color resist elementGA first color resistance subsection 601 representing a green color resistance unit in the second direction y; x1BThe length of the first color resist subsection 601 in the first direction x, Y1, representing the blue color resist cellBThe length of the first color resist subsection 601 of the blue color resist unit in the second direction y is shown. In addition, the second color resistance subsection 602 in the color resistance cell 60 of different color satisfies
I.e. the ratio of the lengths of the second color-resisting subsections 602 of the color-resisting units 60 of different colors in the first direction x and the second direction y is equal. In the formula, X2RThe length of the second color resistance subsection 602 in the first direction x, Y2, representing a red color resistance cellRA second color resistance subsection 602 representing the length of the red color resistance cell in the second direction y; x2GThe length of the second color resistance subsection 602 in the first direction x, Y2, representing the green color resistance cellGA second color-resistance subsection 602 representing the green color-resistance cell length in the second direction y; x2BThe length of the second color-resistor subsection 602 in the first direction x, Y2, representing a blue color-resistor elementBThe second color-resistance subsection 602 representing the blue color-resistance cell has a length in the second direction y.
Based on the same inventive concept, an embodiment of the present invention further provides a display device, and fig. 10 is a schematic structural diagram of a display device according to an embodiment of the present invention, and the display device 200 includes the display panel 100 according to any of the embodiments, so that the display device has the same beneficial effects as the display panel, and reference may be made to the description of the embodiment of the display panel for the same points, which is not repeated herein. The display device 200 provided in the embodiment of the present invention may be a mobile phone as shown in fig. 10, and may also be any electronic product with a display function, including but not limited to the following categories: the touch screen display system comprises a television, a notebook computer, a desktop display, a tablet computer, a digital camera, an intelligent bracelet, intelligent glasses, a vehicle-mounted display, medical equipment, industrial control equipment, a touch interaction terminal and the like, and the embodiment of the invention is not particularly limited in this respect.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (13)
1. A display panel, comprising:
a substrate base plate;
a pixel defining layer on one side of the substrate base plate; the pixel defining layer is provided with a plurality of first openings, and the apertures of the first openings are gradually increased along the direction of the substrate base plate pointing to the pixel defining layer to form the side walls of the first openings;
the light-emitting layer comprises a plurality of light-emitting units, and the light-emitting units are positioned in the first opening and positioned on one side of the first opening close to the substrate; the thickness of the light-emitting unit is smaller than the depth of the first opening along the direction perpendicular to the plane of the substrate base plate;
the first electrode layer is positioned on one side, away from the substrate base plate, of the light-emitting layer and the pixel limiting layer; the first electrode layer comprises a first electrode subsection, and an orthographic projection of the first electrode subsection on the substrate base plate is overlapped with an orthographic projection of a side wall of the first opening on the substrate base plate;
the first shading structure is positioned on one side of the first electrode layer, which is far away from the substrate base plate; an orthographic projection of the first light shielding structure on the substrate base plate overlaps with an orthographic projection of the first electrode subsection on the substrate base plate.
2. The display panel of claim 1, wherein an orthographic projection of the first light blocking structure on the substrate base plate covers an orthographic projection of the first electrode segment on the substrate base plate.
3. The display panel of claim 2, wherein an orthographic projection of the first light blocking structure on the substrate base overlaps with an orthographic projection of the first electrode segment on the substrate base.
4. The display panel of claim 1, wherein the first light blocking structure is in contact with the first electrode segment.
5. The display panel according to claim 1, characterized in that the display panel further comprises:
the color filter layer is positioned on one side, far away from the substrate base plate, of the first electrode layer; the color filter layer comprises a plurality of color resistance units, a second shading structure is arranged between every two adjacent color resistance units, and the orthographic projection of the color resistance units on the substrate base plate covers the orthographic projection of the light-emitting units on the substrate base plate;
the first shading structure and the second shading structure are arranged on the same layer.
6. The display panel according to claim 5, wherein the first light shielding structure has a thickness smaller than that of the second light shielding structure in a direction perpendicular to the plane of the substrate base plate.
7. The display panel according to claim 5, wherein the first light shielding structure and the second light shielding structure are made of the same material in the same process.
8. The display panel according to claim 1, characterized in that the display panel further comprises:
the color filter layer is positioned on one side, far away from the substrate base plate, of the first electrode layer; the color filter layer comprises a plurality of color resistance units, and the orthographic projection of the color resistance units on the substrate covers the orthographic projection of the light-emitting units on the substrate;
the light emitting unit comprises a first color light emitting unit, a second color light emitting unit and a third color light emitting unit, and the central wavelength of the first color light emitted by the first color light emitting unit is lambda1The central wavelength of the second color light emitted by the second color light emitting unit is lambda2The central wavelength of the light of the third color emitted by the light emitting unit of the third color is lambda3(ii) a The color resistance unit comprises a first color resistance unit, a second color resistance unit and a third color resistance unit, the first color resistance unit is arranged corresponding to the first color light-emitting unit, the second color resistance unit is arranged corresponding to the second color light-emitting unit, and the third color resistance unit is arranged corresponding to the third color light-emitting unit;
the first shading structure comprises a first sub shading structure, a second sub shading structure and a third sub shading structure; the orthographic projection of the first sub light shielding structure on the substrate is overlapped with the orthographic projection of the first color resistance unit on the substrate, the orthographic projection of the second sub light shielding structure on the substrate is overlapped with the orthographic projection of the second color resistance unit on the substrate, and the orthographic projection of the third sub light shielding structure on the substrate is overlapped with the orthographic projection of the third color resistance unit on the substrate;
the first sub light shielding structure and the second color resistance unit and/or the third color resistance unit are prepared from the same material in the same process, the second sub light shielding structure and the first color resistance unit and/or the third color resistance unit are prepared from the same material in the same process, and the third sub light shielding structure and the first color resistance unit and/or the second color resistance unit are prepared from the same material in the same process.
9. The display panel according to claim 8, wherein the first light shielding structures are embedded in the corresponding color resistance units, and a thickness of the first light shielding structures is smaller than a thickness of the corresponding color resistance units in a direction perpendicular to a plane of the substrate base plate.
10. The display panel according to claim 8, wherein the first light shielding structure has a thickness of 1 μm to 5 μm; the thickness of the color resistance unit overlapped with the orthographic projection of the first light shielding structure on the substrate base plate is 1-5 mu m.
11. The display panel according to claim 8, wherein the light of the first color has a central wavelength of 620nm to 630nm, the light of the second color has a central wavelength of 555nm to 585nm, and the light of the third color has a central wavelength of 440nm to 480 nm.
12. The display panel according to claim 1, wherein the display panel further comprises a color filter layer on a side of the first electrode layer away from the substrate base plate;
the color filter layer comprises a plurality of color resistance units, a second shading structure is arranged between every two adjacent color resistance units, and the orthographic projection of the color resistance units on the substrate base plate covers the orthographic projection of the light-emitting units on the substrate base plate;
the color resistance unit comprises a first color resistance subsection and a second color resistance subsection; the orthographic projections of the first color resistance sub-part, the second color resistance sub-part, the first shading structure and the second shading structure on the substrate are respectively a first color resistance projection, a second color resistance projection, a first shading projection and a second shading projection in sequence; the first color resistance projection, the second color resistance projection, the first shading projection and the second shading projection are not overlapped with each other, the first shading projection surrounds the first color resistance projection, the second color resistance projection surrounds the first shading projection, and the second shading projection surrounds the second color resistance projection;
the color resistance units comprise a plurality of color resistance units with different colors, the ratio of the lengths of the first color resistance parts of the color resistance units with different colors in the first direction to the length of the second color resistance parts of the color resistance units with different colors in the second direction is equal, and the ratio of the lengths of the second color resistance parts of the color resistance units with different colors in the first direction to the length of the second color resistance parts of the color resistance units with different colors in the second direction is equal;
the first direction and the second direction are intersected and are parallel to the plane of the substrate base plate.
13. A display device characterized by comprising the display panel according to any one of claims 1 to 12.
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